Air-pump



P. A. FISKER.

AIR PUMP.

nruonxon rum) DEO.31,1910.

Patented Aug. 6, 1912.

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EEDEB ANIJEBSEN FISKEB, 0F CQPENHAGEN, DENMARK.

AIR PUHP Specification of Letters Patent.

Patented Augxfi. 191.

Application filed December 31,1910. Serial No. 600,868.

when; it may m'iwern: .80- it known that I, PEDER ANDERSEN Fishes, of Copenhagen, Denmark, have inieoted a new and useful Improvement in Air-uinps, of which the following is a. full, clear, and exactdescription.

M invention relates to improvements in air pinnps for which motive power is preferably supplied by an electric motor, and which though they may be used for any desired purpose, are more especially adepted ior use in a vacuum cleaner, so called, which reap es suction device for the re inovol or dust and dirt from carpets, rugs, floors etc.

he object of my invention is to provide on air pump which is a simple and powerful suction device, and to this end I provide e f r s of two or more suction wheels operu l on a common shaft and so arranged thatthe unas drawn in by one wheel is thrown i ibwrird X ,y means of the intervening plates he center of the wheel next. to it. in this way I provide a device which is very compact in form, simple in ci'instruction, but in which the power of each suction wheel fully utilized, and which by reason of the form of the intervening plates between the suction wheels, practically noiseless in operation.

Reference is to be had to the accompanying drawim s forming a part of this specification, in which similar reference characters ndicate corresponding parts in all the views.

Figure 1 is an elevation partly in section, of the apparatus embodying my invention. Fig. .Z'is a sectional view of a. detail on the line ABof Fig. 1, and Fig. 3 is a sectional view of a detail on the line C D of Fig. 1.

Means for operating the apparatus com prising my invention muy be supplied in any desired way. I have indicated in the drawings a simple and convenient way which is represented by the motor 1, one bearing of the motor being shown in the drawing as supported in the casing 9. The entire apparatus is provided on the top with a handle 3. The other bearing of the motor is supported by the cup shaped extension or casing 4 which surrounds the outer end of the shaft This part of the shaft 5 carries one or more suction wheels 6. In the drawings out two of these wheels are shown, but it will be understood that if desired three or four or any number may be used.

The suction wheels 6 are rigidly supported on the shaft. 5 and spaced apart in any desired way as by a piece of tube 7. These suction wheels thei'nselves are in the form of solid circular disks. and are provided on their lower surfaces with radially arranged vanes. These vanes are so shaped that they taper slightly toward the periphery of the disk. Between the wheels 6-6 I provide two plntcs9 and 10 which are supported on their outer edges by the casing 4 in such a way that along their circumference they are held tightly against the casing or cylinder 4. The upper plate 9 is provided *ith a hole at its center somewhat larger than the shaft of the motor. The other plate 10 is provided with a series of perforations near its periphery andis adapted to it closely around the shaft of the motor in the center. This plate 10 is further provided on its upper surface with ribs 11 inwardly turned toward its center, and of sutficient height to space the plates 9 and 10 apart. The lower-part of the casing or cylinder t is closed by the plate 152 which has an opening in the middle. This plate l2 curries near its outer circumference a flange 13 which fits inside the casing 4 and also has a downwardly extending flange to fit and hold the apparatus on a bucket or receptacle 14. Between the bucket 14 and the plate 12 is provided packing 20, and the parts are clamped together by means of the hinged hooks 23. At the top of the casing 4 I provide outlet openings 22. In the lower part of the bucket is shown an opening 21 which may be connected in the ordinary manner with a hose provided with a suitable mouth piece such as used in a. vacuum cleaner. lliai'e not indicated in the drmi-infzs leading-in wires iorthe mo tor, but. it will be understood that such wires and a suitable controller may be provided.

When the suction wheels are rotated by the motor a partial vacuum will be caused in the bucket 4 by the air being drawn up by the lower wheel (3 and forced against the inner surface of the casing 4, up through the perforati ns 24 in the plate 10. The air then is forced by means of the ribs 11 t0- ward the center of the plate 9 and is then drawn up by the upper wheel 6 and forced. out of the apparatus through the openings 22. In this way the full suction power of the wheels 6-6 is utilized, and by providing the intervening plates, one of which is perforated near its periphery and has the inwardly turned vanes on its upper surface, the air pump is comparatively noiseless in operation.

An air pump comprising a receptacle having an air opening therein, a casing seated in the rece tacle and provided with air openings in the upper part thereof, a vertically arranged shaft in the casing, sue tion wheels spaced apart on the said shaft,

each wheel comprising a plate with ribs or wings on the under side thereof, and stationary plates between the suction Wheeis and beneath the lowest suction Wheel, the edge of each of said plates being supported by and in close contact with the wall of the casing, said plates being alternately provided with an opening near the center and perforations near the peripheral edge, the plates having perforations near the edge having curved ribs on one surface extend ing from the periphery to a point near the center.

In testimony whereof, I have signed my name to this specification in the presence of two subscribing witnesses.

PEDER ANDERSEN FISKER.

Vitnesses:

Vmeo Brion, FLEIscHEE. 

